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Published online by Cambridge University Press: 31 May 2012
A pour-on formulation of ronnel and 1% coumaphos dust were tested for control of cattle lice under southern Ontario feedlot conditions. Moderate to heavy populations of the cattle biting louse Bovicola bovis and light populations of the sucking lice Linognathus vituli and Haematopinus eurysternus were present on the treated cattle. The ronnel and coumaphos dust gave excellent reduction of lice populations for 43 and 35 days, respectively.